CN105275522A - Valve bridge assembly - Google Patents
Valve bridge assembly Download PDFInfo
- Publication number
- CN105275522A CN105275522A CN201510881830.4A CN201510881830A CN105275522A CN 105275522 A CN105275522 A CN 105275522A CN 201510881830 A CN201510881830 A CN 201510881830A CN 105275522 A CN105275522 A CN 105275522A
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- China
- Prior art keywords
- valve
- valve cap
- valve bridge
- air valve
- cap
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Abstract
The invention discloses a valve bridge assembly which comprises a valve bridge, a valve cap and a spring. One end of the valve bridge is provided with a stepped installation hole. The valve cap is of a big-end-down stepped cylinder and is inserted into the installation hole from bottom to top. An annular gap is formed between partial sleeved sections of the outer wall of the valve cap and the inner wall of the installation hole. The valve cap is sleeved with the spring which is contained in the annular gap. The spring is used for enabling the valve cap and the valve bridge to be in an attached state in the working state. According to the valve bridge assembly, consistent contact between the valve bridge and the valve cap is achieved through pretightening of the spring, and failures caused by separation of the valve bridge from the valve cap are solved.
Description
Technical field
The present invention relates to engine valve control field, particularly a kind of air valve bridge assembly.
Background technique
In the prior art scheme, when motor runs, the motion of valve can be divided into valve opening and valve-closing two strokes, in valve opening stroke, valve is subject to the moved downward such as rocking arm until valve standard-sized sheet, enter valve closing stroke subsequently, valve spring-loaded moves upward until air valve drop, so goes round and begins again.In engine cylinder under auxiliary braking operating conditions, the brake piston being positioned at valve cap upper end moves downward and keeps the overhang of about 1mm.Assuming that braking start-up time valve is in opening travel and at seated position, now, brake piston presses down valve cap, valve cap is moved downward relative to air valve bridge, and then open corresponding braking valve, along with motor runs, valve continues to move downward by rocking arm active force, until valve standard-sized sheet.Subsequently, valve enters shutoff stroke, and now valve moves upward, and when braking valve motion contacts to valve cap with brake plunger, braking valve cannot be taken a seat and be kept certain aperture, and non-brake valve can continue to move upward until closedown of taking a seat.
But, in the prior art scheme, in engine cylinder under auxiliary braking operating conditions, during valve-closing, braking valve is owing to affecting by brake piston, braking valve can not be taken a seat completely, now, air valve bridge inertia moves upward, and air valve bridge is separated with valve cap, even strike snap ring, cause snap ring to rupture.Because air valve bridge and valve cap exist segregation phenomenon, air valve bridge tilts, and air valve bridge can give valve cap moment of flexure, causes valve cap to rupture.And valve is when reentering valve opening stroke, under the effect of rocking arm, air valve bridge moves downward and strikes valve cap, causes motion artifacts to increase.
The information being disclosed in this background technique part is only intended to increase the understanding to general background of the present invention, and should not be regarded as admitting or imply in any form that this information structure has been prior art that persons skilled in the art are known.
Summary of the invention
The object of the present invention is to provide a kind of air valve bridge assembly, by the pretension of spring, achieve air valve bridge and contact all the time with valve cap, solve air valve bridge is separated generation fault with valve cap.
For achieving the above object, the invention provides a kind of air valve bridge assembly, comprising: air valve bridge, one end of this air valve bridge has the mounting hole of stepped shape; Valve cap, it is up-small and down-big stepped cylindrical, valve cap from bottom to up be plugged in mounting hole, between sheathed section of the part of the inwall of mounting hole and the outer wall of valve cap, there is annular space; And spring, this spring housing to be located on valve cap and to be contained in annular space, spring be used for by valve cap and air valve bridge in working order in be in fit-state.
Preferably, the top of mounting hole is the guide cylinder hole inside contracted, and the bottom of mounting hole is cylindrical hole, and the inner side of the bottom of cylindrical hole has annular groove; The top of valve cap is the positioning cylinder inside contracted, this positioning cylinder coordinates with guide cylinder interporal lacuna, the bottom of valve cap is cylindrical section, the joint of cylindrical section and positioning cylinder is protruding with support level, be provided with back-up ring in annular groove, spring housing is located on cylindrical section and spring is between back-up ring and support level.
Preferably, the cylindrical section near back-up ring is recessed shape.
Preferably, the bottom of valve cap has counterbore, and the end face of counterbore is valve attachment face.
Compared with prior art, the present invention has following beneficial effect: this air valve bridge assembly, simple and reasonable, by the pretension of spring, achieves air valve bridge and contacts all the time with valve cap, solves air valve bridge is separated generation fault with valve cap.
Accompanying drawing explanation
Fig. 1 is the sectional view according to air valve bridge assembly of the present invention;
Fig. 2 is the sectional view according to air valve bridge in air valve bridge assembly of the present invention;
Fig. 3 is the sectional view according to valve cap in air valve bridge assembly of the present invention;
Fig. 4 is the using state figure according to air valve bridge assembly of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail, but is to be understood that protection scope of the present invention not by the restriction of embodiment.
Clearly represent unless otherwise other, otherwise in whole specification and claims, term " comprise " or its conversion as " comprising " or " including " etc. by be understood to include the element of stating or constituent element, and do not get rid of other element or other constituent element.
As shown in Figure 1 to Figure 3, according to a kind of air valve bridge assembly of the specific embodiment of the invention, air valve bridge 1, valve cap 2 and spring 3 is comprised.Wherein one end of this air valve bridge 1 has the mounting hole (see Fig. 2) of stepped shape, valve cap 2 is in up-small and down-big stepped cylindrical, valve cap 2 from bottom to up be plugged in mounting hole, between sheathed section of the part of the inwall of mounting hole and the outer wall of valve cap 2, there is annular space, spring 3 to be set on valve cap 2 and to be contained in annular space (see Fig. 1), spring 3 be used for by valve cap 2 and air valve bridge 1 in working order in be in fit-state.
As a kind of preferred embodiment, the top of mounting hole is the guide cylinder hole 5 inside contracted, the bottom of mounting hole is cylindrical hole 6, the inner side of the bottom of cylindrical hole 6 has annular groove 7 (see Fig. 2), the top of valve cap 2 is the positioning cylinder 8 inside contracted, this positioning cylinder 8 and guide cylinder hole 5 Spielpassung, the bottom of valve cap 2 is cylindrical section 10, cylindrical section 10 is protruding with support level 9 with the joint of positioning cylinder 8, be provided with back-up ring 4 (see Fig. 1) in annular groove 7, spring 3 is set on cylindrical section 10 and spring 3 is between back-up ring 4 and support level 9.
As a kind of preferred embodiment, the cylindrical section near back-up ring 4 is recessed shape.
As a kind of preferred embodiment, the bottom of valve cap 2 has counterbore, and the end face of counterbore is valve attachment face 11.
Preferred embodiment this programme is described in detail with one below:
As shown in Figure 4, after air valve bridge 1 and valve cap 2 assemble, positioning cylinder 8 on valve cap 2 is Spielpassung with the guide cylinder hole 5 on air valve bridge 1, preferably small―gap suture coordinates, and play the guiding role in movement process, spring 3 is arranged in the space between air valve bridge 1 and valve cap 2, the upper end of spring 3 is supported on the support level 9 of valve cap 2, back-up ring 4 is elastic component, matches with the annular groove 7 of air valve bridge 1, and the lower end of spring 3 is supported on back-up ring 4.So, under the effect of spring 3 pretightening force, valve cap 2 and air valve bridge 1 fit tightly.
In engine cylinder under auxiliary braking operating conditions, the brake piston 12 being positioned at valve cap 2 upper end moves downward and keeps the overhang of about 1mm.Assuming that braking start-up time valve 13 is in opening travel and at seated position, now, brake piston 12 presses down valve cap 2, valve cap 2 times pressing springs 3, air valve bridge 1, under the effect of spring 3, synchronously moves downward, and then open corresponding valve 13, along with motor runs, valve 13 continues to move downward, until valve 13 standard-sized sheet.Subsequently, valve 13 enters shutoff stroke, and now valve 13 moves upward, and when moving to valve cap 2 and contacting with brake plunger 12, air valve bridge 1 counteracts its inertial force upwards under the effect of spring 3, and air valve bridge 1 and valve cap 2 are kept in touch.
To sum up, the air valve bridge assembly of the present embodiment, simple and reasonable, by the pretension of spring, achieve air valve bridge and contact all the time with valve cap, solve air valve bridge is separated generation fault with valve cap.
The aforementioned description to concrete exemplary of the present invention is to illustrate and the object of illustration.These descriptions not want the present invention to be defined as disclosed precise forms, and obviously, according to above-mentioned instruction, can much change and change.The object selected exemplary embodiment and describe is to explain certain principles of the present invention and practical application thereof, thus those skilled in the art can be realized and utilize various different exemplary of the present invention and various different selection and change.Scope of the present invention is intended to limited by claims and equivalents thereof.
Claims (4)
1. an air valve bridge assembly, is characterized in that, comprising:
Air valve bridge, one end of this air valve bridge has the mounting hole of stepped shape;
Valve cap, it is up-small and down-big stepped cylindrical, described valve cap from bottom to up be plugged in described mounting hole, between sheathed section of the part of the inwall of described mounting hole and the outer wall of described valve cap, there is annular space; And
Spring, this spring housing to be located on described valve cap and to be contained in described annular space, described spring be used for by described valve cap and described air valve bridge in working order in be in fit-state.
2. air valve bridge assembly according to claim 1, is characterized in that, the top of described mounting hole is the guide cylinder hole inside contracted, and the bottom of described mounting hole is cylindrical hole, and the inner side of the bottom of described cylindrical hole has annular groove;
The top of described valve cap is the positioning cylinder inside contracted, this positioning cylinder coordinates with described guide cylinder interporal lacuna, the bottom of described valve cap is cylindrical section, the joint of described cylindrical section and described positioning cylinder is protruding with support level, be provided with back-up ring in described annular groove, described spring housing is located on described cylindrical section and described spring is between described back-up ring and described support level.
3. air valve bridge assembly according to claim 2, is characterized in that, the cylindrical section near described back-up ring is recessed shape.
4. air valve bridge assembly according to claim 1, is characterized in that, the bottom of described valve cap has counterbore, and the end face of described counterbore is valve attachment face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510881830.4A CN105275522A (en) | 2015-12-04 | 2015-12-04 | Valve bridge assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510881830.4A CN105275522A (en) | 2015-12-04 | 2015-12-04 | Valve bridge assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105275522A true CN105275522A (en) | 2016-01-27 |
Family
ID=55145243
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510881830.4A Pending CN105275522A (en) | 2015-12-04 | 2015-12-04 | Valve bridge assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105275522A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110925043A (en) * | 2019-11-28 | 2020-03-27 | 哈尔滨东安汽车动力股份有限公司 | Roller rocker arm and mechanical tappet structure for inclined engine |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS601312A (en) * | 1983-06-17 | 1985-01-07 | Honda Motor Co Ltd | Valve operating device with pause function |
| EP0974740A2 (en) * | 1998-07-20 | 2000-01-26 | Cummins Engine Company, Ltd. | Compression release engine braking system |
| JP2007056822A (en) * | 2005-08-26 | 2007-03-08 | Kubota Corp | Multiple valve engine |
| CN101142380A (en) * | 2004-03-15 | 2008-03-12 | 雅各布斯车辆系统公司 | Valve bridge with integrated lost motion system |
| CN102102559A (en) * | 2011-03-10 | 2011-06-22 | 奚勇 | Compression releasing engine braking method and device |
| CN201891446U (en) * | 2010-11-23 | 2011-07-06 | 广西玉柴机器股份有限公司 | Engine valve bridge component |
| CN202215318U (en) * | 2011-08-29 | 2012-05-09 | 东风汽车有限公司 | Air valve yoke for engine braking |
-
2015
- 2015-12-04 CN CN201510881830.4A patent/CN105275522A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS601312A (en) * | 1983-06-17 | 1985-01-07 | Honda Motor Co Ltd | Valve operating device with pause function |
| EP0974740A2 (en) * | 1998-07-20 | 2000-01-26 | Cummins Engine Company, Ltd. | Compression release engine braking system |
| CN101142380A (en) * | 2004-03-15 | 2008-03-12 | 雅各布斯车辆系统公司 | Valve bridge with integrated lost motion system |
| JP2007056822A (en) * | 2005-08-26 | 2007-03-08 | Kubota Corp | Multiple valve engine |
| CN201891446U (en) * | 2010-11-23 | 2011-07-06 | 广西玉柴机器股份有限公司 | Engine valve bridge component |
| CN102102559A (en) * | 2011-03-10 | 2011-06-22 | 奚勇 | Compression releasing engine braking method and device |
| CN202215318U (en) * | 2011-08-29 | 2012-05-09 | 东风汽车有限公司 | Air valve yoke for engine braking |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110925043A (en) * | 2019-11-28 | 2020-03-27 | 哈尔滨东安汽车动力股份有限公司 | Roller rocker arm and mechanical tappet structure for inclined engine |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160127 |
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| WD01 | Invention patent application deemed withdrawn after publication |